public class ArrayDemo1{

    public static void main(String[] args){

        //1 定义数组 并同时赋值

        int[] arr = new int[]{3,9,5,8,2};

        //                            4

        System.out.println(arr.length);

        System.out.println(arr[arr.length-1]);

        System.out.println("=========================");

        //2定义数组 直接用大括号赋值

        int[] arr1 = {22,56,89};

        System.out.println(arr1[arr1.length-1]);

        // 3 为数组赋值

        arr1[2] = 111;

        System.out.println(arr1[arr1.length-1]);

    }

}

public class ArrayDemo2{

    public static void main(String[] args){

        //1 定义数组 并同时赋值

        int[] arr = {3,9,5,8,2,87};

        int max=arr[0];

        for(int i=0;i<=5;i++){

            //遍历

            //System.out.println(arr[i]);

            if(max<arr[i]){

                max=arr[i];

            }

        }

        System.out.println(max);

    }

}